Note: This is far from a scientific examination of both versions of iOS 4. We only had one iPhone 3G to work with and couldn't run through the trials at the exact same time. As a result, some of the actions are not perfect, but they nonetheless demonstrate some performance differences between iOS 4.0 and iOS 4.1.

Double note: To clarify, iOS 4.1 isn't yet available through iTunes; what you see, however, is the final 4.1 release running on our iPhone 3G.

The video demonstrates the results, but here they are in all their glory:

Messages: iOS 4.1 Wins (By a Little)

Maps: iOS 4.1 Wins (By a Lot)

Photos: iOS 4.1 Wins (Just Barely)

Safari: iOS 4.1 Wins (Just Barely)

While the speed advantages ranged from marginal to significant, iOS 4.1 clearly outperformed iOS 4.0. It's still significantly slower performance than you'll get from a 3GS or iPhone 4, and we're still not sure it's a big enough improvement that 3G owners will want to ditch iOS 3. The most obvious difference was UI responsiveness. The UI didn't get stuck nearly as much on an interface element or when trying to enter text. If you are set on using iOS 4, the upgrade is worthwhile for that alone.